CN117498583A - Radial magnetic field three-phase alternating current permanent magnet brushless motor - Google Patents

Abstract

The invention provides a radial magnetic field three-phase alternating current permanent magnet brushless motor, which is different from a common three-phase alternating current motor, wherein a motor stator is formed by superposing silicon steel sheets, the inside of which is cylindrical and is provided with armature grooves and armature teeth for winding, a cylindrical rotor is radially provided with permanent magnets with magnetic force lines perpendicular to a motor rotating shaft, the magnetic force lines generated by the stator and the rotor are perpendicular to a motor shaft, the stator and the rotor can be directly used on a three-phase alternating current power supply without a driver, and speed regulation can also be carried out through an alternating current frequency converter, so that the motor efficiency, the power and the torque are improved under the same specification condition compared with the traditional three-phase alternating current motor, and all north and south poles of a magnetic rotor containing the permanent magnets are driven during each driving, so that high electric energy driving efficiency and high power density are realized. The energy conservation and emission reduction are realized on the daily industrial power application, and the method has the application prospect and very important significance of replacing the three-phase alternating current motor which is widely used at present.

Description

Radial magnetic field three-phase alternating current permanent magnet brushless motor

The invention discloses a radial magnetic field three-phase alternating current permanent magnet brushless motor.

Technical Field

The invention relates to the technical field of three-phase alternating current motors.

The background technology is as follows:

the radial magnetic field three-phase alternating current permanent magnet brushless motor is a novel product for converting electric energy into mechanical energy.

A three-phase AC motor is a typical main mode for converting electric energy into mechanical energy in industrial application, and the principle is that a cylindrical stator is wound with three-phase winding coils, when three-phase AC passes through the stator, a rotating magnetic field is generated, current is induced on a squirrel-cage rotor, a magnetic field on the rotor is generated, the magnetic fields of the stator and the rotor interact to drive the rotor to rotate, and mechanical energy is output. In the prior art, loss occurs during the induction of current on the squirrel-cage rotor by the induced current being reduced by the forced air gap between the stator and rotor, and the induced current on the squirrel-cage rotor and the magnetic field on the rotor will again be lost, resulting in a decrease in the efficiency of the motor. The radial magnetic field three-phase alternating current permanent magnet brushless motor directly acts a rotating magnetic field generated by three-phase alternating current on the stator on the rotor with the permanent magnet to drive the rotor to rotate, improves the conversion efficiency from electric energy to output mechanical energy, and compared with a direct current brushless motor, removes a driver with high cost, thereby having important significance for energy conservation and emission reduction in industrial power application, and being green and low in carbon.

Disclosure of Invention

In the radial magnetic field three-phase alternating current permanent magnet brushless motor, a mode that magnetic force lines of a stator and a rotor are perpendicular to a cylindrical rotor rotating shaft is adopted, a permanent magnet on the rotor is radially arranged on a rotor cylinder, the magnetic force lines are perpendicular to the rotor rotating shaft, a motor stator is formed by superposing a silicon steel sheet, the inside of which is cylindrical and is provided with armature grooves for winding wires and armature teeth, a winding mode of a stator coil on the motor stator is wound around five armature tooth grooves in a distributed mode, the magnetic force lines generated by the stator and the rotor are perpendicular to a motor shaft, the magnetic force lines can be directly used on a three-phase alternating current power supply without a driver, and can also be subjected to speed regulation through a frequency converter, so that the motor efficiency and power are improved under the same specification as compared with the traditional three-phase alternating current motor, and the torque and the driving power are increased when the motor is driven each time, and the radial magnetic field three-phase alternating current permanent magnet brushless motor is named.

The radial magnetic field three-phase alternating current permanent magnet brushless motor can be regulated by the three-phase alternating current frequency converter with adjustable output frequency, three phase lines output by the alternating current frequency converter are connected to the three phase lines of the radial magnetic field three-phase alternating current permanent magnet brushless motor, and the frequency of the three-phase alternating current output by the frequency converter is changed, so that the aim of regulating the rotating speed is fulfilled.

Drawings

Fig. 1 is a schematic diagram of a stator M1 with a three-phase 24-tooth stator in a distributed winding manner, in which the arrows on the windings indicate the winding direction, the winding manner is five-tooth winding across six tooth slots, the winding directions of two adjacent coils of the same phase are opposite, and when the teeth of the two coils are not counted, the centers of the two coils are separated by 5 teeth. The windings of adjacent phases are separated by 3 armature slots when the armature slots where the winding start points are not counted. M2 in the figure is a two-to-four pole cylindrical rotor.

The U-phase winding starts with U1, the winding turns from the left armature slot of the armature 1 to the right armature slot of the armature 5 (the center of the coil is at the armature 3), from the right armature slot of the armature 5 after the required number of turns, to the right armature slot of the armature 11, to the left armature slot of the armature 7 (the center of the coil is at the armature 9 and 5 armature teeth from the center of the previous coil), from the left armature slot of the armature 7 after the required number of turns, to the left armature slot of the armature 13, to the right armature slot of the armature 17 (the center of the coil is at the armature 15 and 5 armature teeth from the center of the previous coil), from the right armature slot of the armature 17 after the required number of turns, to the right armature slot of the armature 23, from the left armature slot of the armature 19 (the center of the coil is also at the center of the armature 21 and the armature slot of the previous coil is at the center of the armature 2 after the required number of turns), and the left armature slot of the armature 19 is at the center of the same time from the center of the armature slot of the previous coil 2 after the required number of turns.

The V-phase winding starts with V1, the winding turns from the left armature slot of the armature tooth 5 to the right armature slot of the armature tooth 9 (the center of the winding is at the armature tooth 7), from the right armature slot of the armature tooth 9 after the required number of turns, to the right armature slot of the armature tooth 15, to the left armature slot of the armature tooth 11 (the center of the winding is at the armature tooth 13 and 5 armature teeth from the center of the previous winding), from the left armature slot of the armature tooth 13 after the required number of turns, to the left armature slot of the armature tooth 17, to the right armature slot of the armature tooth 21 (the center of the winding is at the armature tooth 19 and 5 armature teeth from the center of the previous winding), from the right armature slot of the armature tooth 21 after the required number of turns, to the right armature slot of the armature tooth 3, from the left armature slot of the armature tooth 23 (the center of the winding is also at the center of the armature tooth 2 after the required number of turns) and from the center of the armature slot of the armature tooth 23 after the required number of turns (the center of turns is at the armature tooth 1 and the armature slot is at the center of the armature slot 2).

The W-phase winding starts with W1, the winding turns from the left armature slot of the armature tooth 9 to the right armature slot of the armature tooth 13 (the center of the coil is at the armature tooth 11), from the right armature slot of the armature tooth 13 after the required number of turns, to the right armature slot of the armature tooth 19, to the left armature slot of the armature tooth 15 (the center of the coil is at the armature tooth 17 and 5 armature teeth from the center of the previous coil), from the left armature slot of the armature tooth 15 after the required number of turns, to the left armature slot of the armature tooth 21, to the right armature slot of the armature tooth 1 (the center of the coil is at the armature tooth 23 and 5 armature teeth from the center of the previous coil), from the right armature slot of the armature tooth 1 after the required number of turns, to the right armature slot of the armature tooth 7, and from the left armature slot of the armature tooth 3 (the center of the coil is also at the center of the armature tooth 5 from the armature tooth 2 after the required number of turns) in the counter-clockwise direction.

The starting point of the first coil of the U phase is an armature groove in the middle of the armature teeth 1 and 24, the starting point of the first coil of the V phase is an armature groove in the middle of the armature teeth 4 and 5, and the armature teeth 1 and 2, the armature teeth 2 and 3 armature grooves between the armature teeth 3 and 4 are separated in the middle; armature grooves with the starting point of the first coil of the W phase being in the middle of the teeth 8 and 9 are separated by 3 armature grooves between the teeth 5 and 6, the teeth 6 and 7 and the teeth 7 and 8 compared with armature grooves with the starting point of the V phase being in the middle of the teeth 4 and 5; it can be seen that the U, V and W phases are arranged 3 armature slots apart when the armature slot where the winding start is located is not counted. The other ends U2, V2 and W2 of the three-phase winding are connected and conducted to form star connection.

Fig. 2 is a magnetic diagram of the radial magnetic field three-phase ac permanent magnet brushless motor of the present invention, three-phase stator windings U1-U2, V1-V2 and W1-W2, on the respective armature teeth when current a+ flows into U1, V1 and W1 respectively and current a-flows out of U2, V2 and W2 phases, arrows on the windings on the diagram indicate current directions, 1 to 24 are armature teeth of the stator thereof, US, UN, VS, VN, and WS, WN indicate magnetic patterns generated on the respective armature teeth by the U, V and W phases respectively, S is a south pole, N is a north pole, such as US and UN indicate south pole US and north pole UN generated on the U phase respectively.

Fig. 3 is a winding diagram showing only one phase winding (U-phase) on the stator by decomposing fig. 1 for easy understanding, and the arrow on the diagram also shows the winding direction and the current inflow direction, the winding is wound by five armature teeth crossing six tooth grooves, the winding coil is wound from the left armature groove of the armature tooth 1 to the right armature groove of the armature tooth 5 (the center of the coil is at the armature tooth 3) in the clockwise direction, is wound from the right armature groove of the armature tooth 5 after the required number of turns, is led to the right armature groove of the armature tooth 11, is wound to the left armature groove of the armature tooth 7 in the counterclockwise direction (the center of the coil is at the armature tooth 9, and when the armature teeth 3 and 9 where two coil centers are not counted, is separated from the center of the previous coil by 5 armature teeth, that is, is separated by the armature teeth 4,5,6,7 and 8), from the left armature groove of the tooth 7 after the required number of turns, to the left armature groove of the tooth 13, to the right armature groove of the tooth 17 in a clockwise direction (the center of the coil is at the tooth 15, when the teeth 9 and 15 of the two coil centers are not counted, 5 teeth are separated from the center of the previous coil, namely teeth 10, 11, 12, 13 and 14 are separated), from the right armature groove of the tooth 17 after the required number of turns, to the right armature groove of the tooth 23, to the left armature groove of the tooth 19 in a counterclockwise direction (the center of the coil is at the tooth 21, when the teeth 15 and 21 of the two coil centers are not counted, 5 teeth are also separated from the center of the previous coil, namely teeth 16, 17, 18 are separated, 19 and 20; meanwhile, when the armature teeth 21 and 3 where the centers of the two coils are located are not counted, the centers of the coils are also separated from the first coil of the two coils located at the armature teeth 3 by 5 armature teeth, namely by the armature teeth 22, 23, 24,1 and 2), and the coils are wound to the required number of turns and then rotated out of the armature groove on the left side of the armature teeth 19. When current flows from U1 to U2, US and UN on the teeth are respectively the south S and north N poles generated on the teeth.

Fig. 4 is a diagram of the magnetic field generated by the three-phase drive current and the drive to the rotor when the U-phase current is 0 degrees.

Fig. 5 is a diagram of the magnetic field generated by the three-phase drive current and the drive to the rotor when the U-phase current is 30 degrees.

Fig. 6 is a diagram of the magnetic field generated by the three-phase drive current and the drive to the rotor when the U-phase current is 60 degrees.

Fig. 7 is a diagram of the magnetic field generated by the three-phase drive current and the drive to the rotor when the U-phase current is 90 degrees.

Fig. 8 is a diagram of the magnetic field generated by the three-phase drive current and the drive to the rotor when the U-phase current is 120 degrees.

Fig. 9 is a diagram of the magnetic field generated by the three-phase drive current and the drive to the rotor when the U-phase current is 150 degrees.

Fig. 10 is a diagram of the magnetic field generated by the three-phase drive current and the drive to the rotor when the U-phase current is 180 degrees.

Fig. 11 is a diagram of the magnetic field generated by the three-phase drive current and the drive to the rotor when the U-phase current is 210 degrees.

Fig. 12 is a diagram of the magnetic field generated by the three-phase drive current and the drive to the rotor when the U-phase current is 240 degrees.

Fig. 13 is a diagram of the magnetic field generated by the three-phase drive current and the drive to the rotor when the U-phase current is 270 degrees.

Fig. 14 is a diagram of the magnetic field generated by the three-phase drive current and the drive to the rotor when the U-phase current is 300 degrees.

Fig. 15 is a diagram of the magnetic field generated by the three-phase drive current and the drive to the rotor when the U-phase current is 330 degrees.

Detailed Description

The number of armature slots of the stator of the radial magnetic field three-phase alternating current permanent magnet brushless motor is equal to the number of north and south magnetic poles of the permanent magnet rotor multiplied by 6. As can be seen in fig. 1, in the case of a three-phase winding, two pairs of 4 poles, the number of slots being equal to 4 poles by 6 slots being 24 slots; if six pairs of 12 poles are used, 72 slots are used.

The winding mode of the stator winding of the radial magnetic field three-phase alternating current permanent magnet brushless motor is that five armature teeth crossing six tooth grooves are wound, the winding directions of adjacent two coils of the same phase winding are opposite, and when the armature teeth of the centers of the two coils are not counted, the centers of the adjacent two coils are separated by 5 armature teeth, so that the winding directions of the adjacent two coils of the same phase winding are kept opposite until the winding is finished, the winding mode is also used for winding the other two phases of windings, and when the armature slots of the starting points of the windings are not counted, the adjacent windings are arranged at intervals of 3 armature slots, as can be seen in fig. 1 and 2. The initial end of each phase winding is led out to connect the phase line of the three-phase alternating current, such as U1, V1 and W1 in figure 2, and the tail parts of each phase winding are connected together, namely U2, V2 and W2 are connected together in figure 2, so as to form a traditional star connection method.

The following is a description of the principle and action mechanism of the present motor by analyzing the magnetic pole variation generated on the armature teeth of the stator and the acting force of the permanent magnet field on the rotor with respect to each phase variation of the three-phase alternating current in the radial magnetic field three-phase alternating current permanent magnet brushless motor in combination with fig. 4 to 15.

In fig. 4 to 15, arrows on the respective windings indicate the current direction, and the current flows from the positive electrode a+ to the negative electrode a-out; the broken lines in each figure represent the direction of magnetic lines from north to south, and in order to show the magnetic lines of force when the three-phase alternating current is in each phase, we have intentionally drawn the rotor smaller to show the magnetic lines of force when in that phase. For theoretical analysis, the magnetic poles of the stator and the rotor can be equivalent to a certain point, and the method is commonly adopted as a common method in electrodynamics. In addition, for clarity, we have hidden from view the corresponding figures for phases with no current flowing (phases at 90, 180, 360 degrees). For the case of one phase winding on one of the teeth shown in the figures, which is energized to produce a south pole, and the other phase winding is energized to produce a north pole, we mark the one tooth with a small circle, such as teeth 3,9, 15 and 21 on fig. 4, which we call electrical losses (power losses). The magnitude of the normalized magnetic field strength is well indicated at the armature teeth, with a value of 0.866 indicated at 0.9. In the following fig. 4 to 15, the so-called "left" and "right" are defined in terms of the left and right positions of the center of the armature tooth 13 so as to unify the directions of observation.

From the basic knowledge of three-phase ac, we know that the phases of three-phase ac differ by 120 degrees in phase, and this common knowledge we do not give a graph of three-phase ac, for example, when the a phase is 0 degrees, the B phase is-120 degrees, and the C phase is 120 degrees, for convenience in understanding we use the U, V, W symbols commonly used in brushless motors to represent the a, B, C phases, which are actually the same, U represents the a phase, V represents the B phase, and W represents the C phase.

The driving conditions of the magnetic poles of the stator and the rotor at each driving moment are described below by taking 30 degrees as a unit (the magnetic field intensity on the armature teeth is all according to a normalization theory, the maximum value is 1, and when the current is 1, the magnetic field intensity on the armature teeth is also 1, and the magnetic field intensity is described by taking a U phase as a phase reference):

at 0 degree, as shown in fig. 4, the U phase is 0 degree, and the magnetic field strength is 0; v phase is-120 deg, its magnetic field strength is-0.866; when the W phase is 120 degrees, the magnetic field intensity is 0.866; the U phase has no current passing through, the current flows in from W1, the current flows out from W2 and flows into V2, and the current flows out from V1. Generating the magnetic poles and strength as shown in fig. 4, the stator south pole is combined with the armature teeth 12 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is combined with the armature teeth 18 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole of the armature teeth 18 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 24 also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the south pole of the armature teeth 24 also pushes the south pole S2 on the rotor to rotate anticlockwise, and the north pole is combined with the armature teeth 6 and also attracts the south pole S2 of the rotor to rotate anticlockwise; the north pole of the armature teeth 6 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole of the stator combined at the armature teeth 12 also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; this together constitutes a counter-clockwise rotation of the rotor. The armature teeth 9, 15, 21 and 3 are magnetized zero by the two windings creating opposite magnetic properties on them and being of equal value.

At 30 degrees, as shown in fig. 5, the U phase is 30 degrees, and the magnetic field strength is 0.5; v phase is-90 degrees, and the magnetic field intensity is-1; when the W phase is 150 degrees, the magnetic field intensity is 0.5; the current flows in from W1 and U1, and from W2 and U2 flows in to V2 and out through V1. Generating magnetic poles and strength as shown in fig. 5, wherein the stator south pole is combined with the armature teeth 13 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is combined with the armature teeth 19 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole of the armature teeth 19 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 1 also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the south pole of the armature tooth 1 also pushes the south pole S2 on the rotor to rotate anticlockwise, and the north pole is combined with the armature tooth 7 and also attracts the south pole S2 of the rotor to rotate anticlockwise; the north pole of the armature teeth 7 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 13 also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; this together constitutes a counter-clockwise rotation of the rotor. The armature teeth 10, 16, 22 and 4 are magnetized zero by the two windings creating opposite magnetic properties on them and being of equal value.

At 60 degrees, as shown in fig. 6, the U phase is 60 degrees, and the magnetic field strength is 0.866; v phase is-60 degrees, and the magnetic field intensity is-0.866; when the W phase is 180 degrees, the magnetic field intensity is 0; the current flows in from U1, flows out from U2 and into V2, and flows out through V1. Generating the magnetic poles and strength as shown in fig. 6, the stator south pole is combined with the armature teeth 14 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is combined with the armature teeth 20 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole of the armature teeth 20 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 2 also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the south pole of the armature teeth 2 also pushes the south pole S2 on the rotor to rotate anticlockwise, and the north pole is combined with the armature teeth 8 and also attracts the south pole S2 of the rotor to rotate anticlockwise; the north pole of the armature teeth 8 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 14 also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; this together constitutes a counter-clockwise rotation of the rotor. The armature teeth 11, 17, 23 and 5 are magnetized zero by the two windings creating opposite magnetic properties on them and being of equal value.

At 90 degrees, as shown in fig. 7, the U phase is 90 degrees, and the magnetic field strength is 1; v phase is-30 degrees, and the magnetic field intensity is-0.5; when the W phase is 210 degrees, the magnetic field intensity is-0.5; the current flows in from U1, flows out from U2 and into V2 and W2, and flows out through V1 and W1. Generating the magnetic poles and strength shown in fig. 7, wherein the stator south pole is combined with the armature teeth 15 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is combined with the armature teeth 21 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole of the armature teeth 21 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 3 also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the south pole of the armature teeth 3 also pushes the south pole S2 on the rotor to rotate anticlockwise, and the north pole is combined with the armature teeth 9 and also attracts the south pole S2 of the rotor to rotate anticlockwise; the north pole of the armature teeth 9 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole of the stator synthesized at the armature teeth 15 also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; this together constitutes a counter-clockwise rotation of the rotor. The armature teeth 12, 18, 24 and 6 are magnetized zero by the two windings creating opposite magnetic properties on them and being of equal value.

At 120 degrees, as shown in fig. 8, the U phase is 120 degrees, and the magnetic field strength is 0.866; v phase is 0 degree, and its magnetic field intensity is 0; when the W phase is 240 degrees, the magnetic field intensity is-0.866; the current flows in from U1, flows out from U2 and into W2, and flows out through W1. Generating the magnetic poles and strength as shown in fig. 8, the stator south pole is combined with the armature teeth 16 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is combined with the armature teeth 22 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole of the armature teeth 22 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 4 also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the south pole of the armature teeth 4 also pushes the south pole S2 on the rotor to rotate anticlockwise, and the north pole is combined with the armature teeth 10 and also attracts the south pole S2 of the rotor to rotate anticlockwise; the north pole of the armature teeth 10 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole of the stator combined at the armature teeth 16 also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; this together constitutes a counter-clockwise rotation of the rotor. The armature teeth 13, 19,1 and 7 are magnetized zero by the two windings creating opposite magnetic properties on them and being of equal value.

At 150 degrees, as shown in fig. 9, the U phase is 150 degrees, and the magnetic field strength is 0.5; v phase is 30 degrees, and the magnetic field intensity is 0.5; when the W phase is 270 degrees, the magnetic field intensity is-1; the current flows in from U1 and V1, and U2 and V2 flow out and into W2, and out through W1. Generating the magnetic pole and strength as shown in fig. 9, the stator south pole is combined with the armature teeth 17 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is combined with the armature teeth 23 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole of the armature teeth 23 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 5 also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the south pole of the armature teeth 5 also pushes the south pole S2 on the rotor to rotate anticlockwise, and the north pole is combined with the armature teeth 11 and also attracts the south pole S2 of the rotor to rotate anticlockwise; the north pole of the armature teeth 11 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 17 also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; this together constitutes a counter-clockwise rotation of the rotor. The armature teeth 14, 20,2, and 8 are magnetized zero by the two windings creating opposite magnetic properties on them and being of equal value.

180 degrees, as shown in FIG. 10, the U phase is 180 degrees, and the magnetic field strength is 0; v phase is 60 degrees, and the magnetic field intensity is 0.866; when the W phase is 300 degrees, the magnetic field intensity is-0.866; the current flows in from V1, flows out from V2 and into W2, and flows out through W1. Generating the magnetic poles and strength as shown in fig. 10, the stator south pole is combined with the armature teeth 18 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is combined with the armature teeth 24 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole of the armature teeth 24 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 6 also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the south pole of the armature teeth 6 also pushes the south pole S2 on the rotor to rotate anticlockwise, and the north pole is combined with the armature teeth 12 and also attracts the south pole S2 of the rotor to rotate anticlockwise; the north pole of the armature teeth 12 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole of the stator combined at the armature teeth 18 also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; this together constitutes a counter-clockwise rotation of the rotor. The armature teeth 15, 21,3 and 9 are magnetized zero by the two windings creating opposite magnetic properties on them and being of equal value.

At 210 degrees, as shown in FIG. 11, the U phase is 210 degrees, and the magnetic field strength is-0.5; the V phase is 90 degrees, and the magnetic field intensity is 1; when the W phase is 330 degrees, the magnetic field intensity is-0.5; the current flows in from V1, flows out from V2 and into W2 and U2, and flows out through W1 and U1. Generating the magnetic pole and strength shown in fig. 11, wherein the stator south pole is combined with the armature teeth 19 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is combined with the armature teeth 1 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole of the armature teeth 1 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 7 also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the south pole of the armature teeth 7 also pushes the south pole S2 on the rotor to rotate anticlockwise, and the north pole is combined with the armature teeth 13 and also attracts the south pole S2 of the rotor to rotate anticlockwise; the north pole of the armature teeth 13 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 19 also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; this together constitutes a counter-clockwise rotation of the rotor. The armature teeth 16, 22,4 and 10 are magnetized zero by the two windings creating opposite magnetic properties on them and being of equal value.

240 degrees, as shown in FIG. 12, the U phase is 240 degrees, and the magnetic field strength is-0.866; the V phase is 120 degrees, and the magnetic field intensity is 0.866; when the W phase is 360 degrees, the magnetic field intensity is 0; the current flows in from V1, flows out from V2 and into U2, and flows out through U1. Generating the magnetic poles and strength shown in fig. 12, wherein the stator south pole is combined with the armature teeth 20 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is combined with the armature teeth 2 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole of the armature teeth 2 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 8 also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the south pole of the armature teeth 8 also pushes the south pole S2 on the rotor to rotate anticlockwise, and the north pole is combined with the armature teeth 14 and also attracts the south pole S2 of the rotor to rotate anticlockwise; the north pole of the armature teeth 14 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 20 also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; this together constitutes a counter-clockwise rotation of the rotor. The armature teeth 17, 23,5 and 11 are magnetized zero by the two windings creating opposite magnetic properties on them and being of equal value.

At 270 degrees, as shown in FIG. 13, the U phase is 270 degrees, and the magnetic field strength is-1; the V phase is 150 degrees, and the magnetic field strength is 0.5; when the W phase is 30 degrees, the magnetic field intensity is 0.5; the current flows in from V1 and W1, and from V2 and W2 into U2 and out through U1. Generating magnetic poles and strength as shown in fig. 13, wherein the stator south pole is combined with the armature teeth 21 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is combined with the armature teeth 3 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole of the armature teeth 3 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 9 also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the south pole of the armature teeth 9 also pushes the south pole S2 on the rotor to rotate anticlockwise, and the north pole is combined with the armature teeth 15 and also attracts the south pole S2 of the rotor to rotate anticlockwise; the north pole of the armature teeth 15 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole of the stator synthesized on the armature teeth 21 also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; this together constitutes a counter-clockwise rotation of the rotor. The armature teeth 18, 24,6 and 12 are magnetized zero by the two windings creating opposite magnetic properties on them and being of equal value.

At 300 degrees, as shown in FIG. 14, the U phase is 300 degrees, and the magnetic field strength is-0.866; the V phase is 180 degrees, and the magnetic field intensity is 0; when the W phase is 60 degrees, the magnetic field intensity is-0.866; the current flows in from W1, flows out from W2 and into U2, and flows out through U1. Generating the magnetic poles and strength as shown in fig. 14, wherein the stator south pole is combined with the armature teeth 22 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is combined with the armature teeth 4 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole of the armature teeth 4 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole of the stator synthesized at the armature teeth 10 also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the south pole of the armature teeth 10 also pushes the south pole S2 on the rotor to rotate anticlockwise, and the north pole is combined with the armature teeth 16 and also attracts the south pole S2 of the rotor to rotate anticlockwise; the north pole of the armature teeth 16 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole of the stator combined armature teeth 22 also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; this together constitutes a counter-clockwise rotation of the rotor. The armature teeth 19,1,7 and 13 are magnetized to zero by the two windings creating opposite magnetic properties on them and being of equal value.

330 degrees, as shown in FIG. 15, the U phase is 330 degrees, and the magnetic field strength is-0.5; v phase is 210 degrees, and the magnetic field intensity is-0.5; when the W phase is 90 degrees, the magnetic field intensity is 1; the current flows in from W1, flows out from W2 and into U2 and V2, and flows out through U1 and V1. Generating the magnetic pole and strength shown in fig. 15, wherein the stator south pole is combined with the armature teeth 23 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is combined with the armature teeth 5 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole of the armature teeth 5 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole of the stator synthesized at the armature teeth 11 also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the south pole of the armature teeth 11 also pushes the south pole S2 on the rotor to rotate anticlockwise, and the north pole is combined with the armature teeth 17 and also attracts the south pole S2 of the rotor to rotate anticlockwise; the north pole of the armature teeth 17 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole of the stator synthesized at the armature teeth 23 also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; this together constitutes a counter-clockwise rotation of the rotor. The armature teeth 20,2,8 and 14 are magnetized to zero by the two windings creating opposite magnetic properties on them and being of equal value.

Through the phase change of the three-phase power supply and the caused driving of the permanent magnet on the rotor, the position of the permanent magnet S2 on the rotor is rotated to the position of S1 when the U phase is 0 degrees, the driving of the primary electric angle is completed, and the process is repeated later, so that the rotation of the motor rotor is realized. From the above process, it can be seen that the rotation speed of the motor rotor is caused by the phase change of the three-phase alternating current, and the speed of the phase change depends on the frequency of the three-phase alternating current, that is, the radial magnetic field three-phase alternating current permanent magnet brushless motor can be adjusted by the three-phase alternating current frequency converter.

The invention provides a winding mode of each phase winding of the radial magnetic field three-phase alternating current permanent magnet brushless motor and drives a motor rotor provided with a permanent magnet under each phase condition when three-phase alternating current is input to improve the conversion efficiency of the three-phase alternating current to realize electric energy and mechanical energy, thereby meeting corresponding industrial application and having great significance.

It will be evident to those skilled in the art that the present invention includes but is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. It is noted that the permanent magnets on the rotor have many different structural shapes and manufacturing modes, such as ring magnetizing and surface magnetic sheet type, and the like, and the permanent magnets are regarded as motors with the same radial magnetic field mode as long as magnetic lines of force are perpendicular to the motor rotating shaft rather than parallel.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (6)

1. The radial magnetic field three-phase alternating current permanent magnet brushless motor comprises a motor stator and a permanent magnet rotor, and is characterized in that: the stator of the radial magnetic field three-phase alternating current permanent magnet brushless motor is formed by superposing silicon steel sheets, the inside of which is cylindrical and is provided with armature grooves for winding wires and armature teeth, magnetic force lines generated by the stator are perpendicular to a motor shaft, three-phase stator windings are wound between the armature teeth, and a radial magnetic field is generated during power-on driving; the cylindrical rotor is provided with permanent magnets with magnetic force lines perpendicular to the rotating shaft of the motor in the radial direction of the rotor cylinder, the magnetic force lines are distributed in the radial direction, the magnetic poles and the north poles of the permanent magnets are alternately arranged, and when in driving, each south pole and each north pole on the rotor are simultaneously driven by the repulsive force and attractive force of a magnetic field generated by a stator coil, and the stator coil is driven by three-phase alternating current.

2. The radial field three phase ac permanent magnet brushless motor of claim 1, wherein: the winding mode of the same phase winding on the armature teeth of the stator formed by superposition of the silicon steel sheets is to wind the same phase winding among five armature teeth crossing six armature grooves in a distributed mode, the winding directions of two adjacent coils of the same phase winding are opposite, and when the armature teeth of the centers of the two coils are not counted, the centers of the two coils are separated by 5 armature teeth; the winding mode of the three-phase windings is the same, and when the armature slots where the starting points of the windings are not counted, the windings of adjacent phases are placed at intervals of 3 armature slots; one end of the three-phase winding is used for being connected with a three-phase alternating current power supply, and the other ends of the three-phase winding are connected together for conducting intercommunication to form star connection.

3. The radial field three phase ac permanent magnet brushless motor of claim 1, wherein: the cylindrical rotor is provided with permanent magnets with magnetic lines perpendicular to the motor rotating shaft in the radial direction on the rotor body, the magnetic lines are distributed in the radial direction, the magnetic poles and the north poles of the permanent magnets are alternately arranged, the permanent magnets can be magnetized in the radial direction by using magnetic rings, and the permanent magnets can also be arranged on the rotor body of the cylindrical rotor.

4. The radial field three phase ac permanent magnet brushless motor of claim 1, wherein: the relationship between the number of magnetic poles of the permanent magnet rotor and the number of armature slots of the stator of the radial magnetic field three-phase alternating current permanent magnet brushless motor is: the number of stator armature slots is equal to the number of the sum of the north and south poles of the permanent magnet rotor multiplied by 6.

5. The radial field three phase ac permanent magnet brushless motor of claim 1, wherein: the starting ends of the three-phase windings are respectively connected to three phase wires of three-phase alternating current with 120 degrees phase difference of each phase, and the motor rotor is driven to rotate by the three-phase alternating current.

6. The radial field three phase ac permanent magnet brushless motor and driver circuit of claim 1, wherein: the rotation speed of the motor rotor can be regulated by a three-phase alternating current frequency converter with 120-degree phase difference of each phase of the output frequency, and three phase lines output by the three-phase alternating current frequency converter are connected to three phase lines of a radial magnetic field three-phase alternating current permanent magnet brushless motor.